February 22, 2016
Well so you had established one way communication from AEM to Campaign and now you have to enable the other way round i.e.Campaign to AEM.
Go to Administration >> Platform >>External accounts>> AEM instance and configure this as per your host name and username and password.
note: use DNS name which can be resolved from campaign.
See if both boxes should be able to communicate with each other(IP whitelisting).

If you are not able to connect then raise a day care ticket fro this.